Good news.
First of all, the guy never left me any feedback. I waited until after the 60 days before re-listing the item because I was afraid that I'd list it and he'd give me negative feedback, and then people would shy away from bidding on the item.
I put it back up for auction last week, and today the auction ended -- and it went for $200 more than last time! Even better, it was purchased by a company in Utah that digitizes stuff - so they'll know how to use it!
http://www.slidescanning.com/
I looked through their bidding history, and they've purchased several of these over the past few months (for generally more than they paid for mine - so it's a win-win ). Everything seems to have worked out for the best - although I won't know for sure until 40 days from now.